Gallienus

Gallienus (218-268) was Roman emperor from 260 (de facto from 258) to 268, succeeeding Valerian and preceding Claudius Gothicus.

Biography
Publius Licinius Egnatius Gallienus was born in 218 in Falerii, Etruria, Italy, the son of emperor Valerian and Mariniana. He was appointed co-emperor under his father in 253, and he fought against attacks on the Roman provinces in Germania and Gaul, also winning a battle in Roman Dacia. In 255, he was made consul, and in 258 he crushed a rebellion by the governor of Pannonia, Ingenuus, after Valerian was captured by the Sassanids at Edessa. In 260, Gallienus became emperor on his father's death in captivity, and he decisively defeated the Alemanni at the Battle of Mediolanium, which ensured that the Alemanni did not invade Italy for ten more years. The Dacian general Regalianus' revolt ended prematurely when the Roxolani killed him, but he also had to deal with the rebellions of Macrianus Major and Postumus. In 261, Macrianus and his son Macrianus Minor were defeated and slain in Thrace, and Postumus' Gallic Empire would remain in a persistent state of rebellion until his death in 269. Gallienus faced another rebellion by Mussius Aemilianus, whom he killed in Egypt. Unfortunately for him, he could not face Aureolus' Milanese cavalry when they mutinied close to home, as he was lured out of his tent without a bodyguard and murdered by Dalmatian commander Cecropius while besieging Aureolus in Pontirolo Nuovo, near Milan.